Home / 258,968.64-388,359-90,441.76

Finding the Fourth Proportional to 258,968.64, 388,359 and 90,441.76

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Solution

The fourth proportional to 258,968.64, 388,359 and 90,441.76 is: 135,629.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,968.64 : 388,359 = 90,441.76 : x
  2. Step 2: Convert to fraction form
    258,968.64/388,359 = 90,441.76/x
  3. Step 3: Cross multiply
    258,968.64x = 388,359 × 90,441.76
  4. Step 4: Simplify right side
    258,968.64x = 35,123,871,471.84
  5. Step 5: Solve for x
    x = 35,123,871,471.84/258,968.64
  6. Step 6: Final answer
    x = 135,629.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.